|
High-energy Nd:YAG laser system with arbitrary sub-nanosecond pulse shaping capability
10.1364/OL.42.002758 2017-07-10 We report on a laser system capable of generating high-energy (>270 mJ) temporally shaped pulses at 1064 nm with 0.43-ns shaping resolution. The pulses are generated by modulation of a continuous-wave seed laser and subsequent amplification by a dual-stage gr... |
|
|
High-efficiency broadband excitation and propagation of second-mode spoof surface plasmon polaritons by a complementary structure
10.1364/OL.42.002766 2017-07-10 A complementary structure based on coplanar waveguides (CPWs) with periodical etching slots is proposed to support spoof surface plasmon polaritons (SSPPs). In contrast to the traditional slotline-based complementary SSPP structure, a dispersion curve of the ... |
|
|
Entanglement in a four-wave mixing process
10.1364/OL.42.002754 2017-07-10 We investigate different kinds of entanglement in a four-wave mixing process with a degenerate pump. After analyses on means and quantum fluctuations of the three output beams (Stokes, anti-Stokes, and pump), we verify the existence of genuine tripartite enta... |
|
|
Dependence of atmospheric refractive index structure parameter (Cn2) on the residence time and vertical distribution of aerosols
10.1364/OL.42.002714 2017-07-07 Effects of absorbing atmospheric aerosols in modulating the tropospheric refractive index structure parameter (Cn2) are estimated using high resolution radiosonde and multi-satellite data along with a radiative transfer model. We report the influence of varia... |
|
|
Optical frequency comb generation with ultra-narrow spectral lines
10.1364/OL.42.002718 2017-07-07 We demonstrate an optical comb source that generates 550 ultra-narrow spectral lines with a spectral linewidth of 1.5–3 kHz, spanning over the C-band. The source originates from a single-mode Brillouin laser processed with phase modulation, pulse compression,... |
|
|
Silicon microring modulator-based RF mixer for millimeter-wave phase-coded signal generation
10.1364/OL.42.002742 2017-07-07 Phase-coded radio frequency (RF) pulses are widely adopted for radar systems as an effective signal format to enable high-range resolution. However, generating such signals conventionally requires high-speed electronics and complex RF circuitry that impose bu... |
|
|
Effects of ambient air pressure on surface structures produced by ultrashort laser pulse irradiation
10.1364/OL.42.002710 2017-07-07 We report an experimental analysis addressing striking effects of residual air ambient pressure, from atmospheric conditions (103 mbar) to high vacuum (10−4 mbar), on the surface structures induced on a silicon target by direct femtosecond laser irradiation. ... |
|
|
Adaptive aberration correction of a 5 J/6.6 ns/200 Hz solid-state Nd:YAG laser
10.1364/OL.42.002730 2017-07-07 In this Letter, we present an adaptive aberration correction system to simultaneously compensate for aberrations and reshaping the beams. A low-order aberration corrector is adapted. In this corrector, four lenses are mounted on a motorized rail, whose positi... |
|
|
2 W single-longitudinal-mode Yb:YAG distributed-feedback waveguide laser
10.1364/OL.42.002734 2017-07-07 Single longitudinal mode (SLM) lasers are important tools for many scientific and commercial applications. SLM operation can be achieved in distributed-feedback (DFB) lasers based on Bragg structures. Semiconductor waveguide DFB lasers are well-established de... |
|
|
Stabilization of femtosecond optical parametric oscillators for infrared frequency comb generation
10.1364/OL.42.002722 2017-07-07 A synchronously pumped optical parametric oscillator (SP-OPO) is one of the most common techniques to generate femtosecond frequency combs in the mid-infrared region. Stable long-term operation of an SP-OPO requires active locking of the OPO resonator round-t... |